As far as being "uninspired" goes, if a painting goes well I think that whatever I might do next will not be as good and therefore I do kind of put things off looking for the "perfect" subject, or at least something that I think might turn out as well as the just finished piece. In other words I am afraid of backsliding which is another way of failing; failing to be better each time, failing to make progress, etc.
If it doesn't go quite as well I will usually try again. I have found thus far that trying again will in most cases not improve things much, unless, as I said before, I let things sit for a while until I can figure out what is wrong with it.
This is all very interesting in light of a book which I have just finished; The War of Art by Steven Pressfield. It is all about resistance to doing our work and about overcoming it. An interesting and useful read.
Anyway, on to the next month!